Latch for elevator-doors.



B. WEXLER.

LATCH FOR ELEVATOR DOORS.

APPLICATION FILED JAN.16\ 1911 1,072,064. Patented Sept. 2, 1913.

' UNITED sTATns V PATENT oFFioE.

BENJAMIN WEXLER. OF BROOKLYN, NEW YORK, ASSIGNOR TO THE PEELLE ('30., OF NEW YORK, N Y., A CORPORATION OF NEW YORK.

LATCH FOR ELEVATOR-DOORS.

To all whom it may concern Be it known that I, BENJAMIN 'EXLER, a. subject of the Czar of Russia, and resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Latches for l llevator-Doors, of which the following is a specification.

The invention relates to improvements in latches for elevator-doors, with particular reference to man lally-opcned self-closing fireproof doors leadingto an elevator shaft; and the object of the invention is to provide a latch for n'iaintaining a door in open position when the elevator-car is alined therewith, and which when the car is shifted from such position, will remain disengaged therefrom to permit of the automatic closing of the door as a protection against accident or fire.

A further object of the invention is to provide a latch-releasing means including a fusible-link connection adapted to operate in the event of fire to release and close the door when latched in open position.

The invention also includes a recoil device operating in conjunction with the latch to facilitate the closing of the door. And a further object comprehends an arrangement of parts for convenient adjustment and accommodation to irregularities in the construction of the elevator shaft. and car supports,

In describing the invention in detail reference is had to the accompanying drawing, forming a part of this specification, and wherein like characters of reference are used to designate like parts throughout the several views, and in which:

Figure 1 is a side elevation of an elevatordoorway, having upper and lower door sections suitably connected together and provided with the improved latch embodied'in the present invention; Fig. 2, a transverse section of the doorway, shown in relation to the door sections and latch; Fig. 3, an enlarged ground plan of the latch, with the adjacent parts shown partially in section; Fig. 4, an enlarged side view of a projected latch; and Fig. 5, a similar view of a retractedlatch.

Numerals 1 and 2 designate respectively the adjacent ortions of the upper and lower sections of a two-part fireproof elevator- Specification of Letters Patent.

Application filed January 16, 1911.

Patented Sept. 2, 1913.

Serial No. 602,759.

door, to the lower section of which i secured a carrier-bar 3, connected at its opposite ends to the flexible bands or chains 4, which lead over the carrier'wheels 5, and are secured to the upper door section. The wheels are mounted upon guide-rails 6, which are fixed to the wall of the elevatorshaft and provided with interior angles 7 for slidingly receiving the guide-blocks 8, secured to the door-sections, which, as thus mounted, are adapted for vertical movement from and toward each other for opening and closin a doorway t), leading to the elevatorshaft, the upper door-section being more heavily constructed to have an overbalancing effect upon the lower section to cause a selfclosing action of the door when opened.

\Vithin the elevator-shaft is movably supported a car of ordinary construction, indicated by the tragmcntal portion of an upright 10 and a platform 11, to the latter of which is secured a hanger 12, carrying a cam 13. 7

Upon one 01 the guide-rails (3 is fixed an angle frame 14, carrying a pin 15 for pivotally supporting a latch-lever 16, on the upper end of which is fixed a pin 17 for hingedly supporting a latclrmember 18. The lower edge of this member is beveled and engages a correspondingly beveled shoulder 19 formed on the latch-lever to serve as a stop to limit the relative movement in one direction about the pin 17, the member being normally retained against the stop by the action of the spring 20, one end of which engages a pin 21, fixed to the latclrmember, while the other end is coiled about and fixed to the pin 21*. The latchthe latch-lever jointly swings therewith about the pin 15, and is normally retained in a retracted position, shown in Fig. 5, by the spring 22, one end of which engages the lower end of the latch-lever while the opposite is coiled about and fixed to the pin 23. The lower end of the latch-lever is also prowhich extends the shank 24 of the shoe 25, which is adjustably' retained in position by the set-screw 26, provided in the lever. The movement of the lever is efiected by the cam 13, fixed to the car and engaging the shoe, the lateral adjustment of the latter with respect to the lever servingv not take member as thus yieldingly supported upon I vided with a slot or perforation, through up the Wear of the parts but as an accommodation for irregularities in the construction of the elevator. Also secured to the anglemediate the guide-blocks with a thrust-collar 30, which engages the upper end of a spiral compression spring 31., arranged to upon the lower guide-block.

The actuation of the recoiler is effected by 1 the manual operation of opening the door. wherein the bottom edge of carrier-bar 3 of the lower door section in its lowermost p0 sition engages the contact-head 9.) to lower 5 the same and compress the recoil-spring 31.,

gagement of the latch-member 18 with the upper edge of the carrier-bar 3, the downward movement of this bar being positively limited by its engagement with the ledge 25;? formed on the angle frame 14. Upon the release of the latchont-mher 1b the spring 31 serves to upwardly move the carrier-bar and its connected lower doc-r section to facilitate the closing of the door by overcoming its inertia of re.--t,;-,

As shown in Figs. 2 and 4, the latch is in its outward or projected position as actuated by the cam 13, tixed upon the car, in which position the door, it' closed, may be readily opened, during which movement the latch member 18 is inwardly urged about its pivotal support by the bar 3 against the action of the latch-spring 20, which independently projects the latch member upon the complete dowrnvard movement of the bar and serves to thus retain the same against the action of the recoil-spring 31. Upon the movement 01"" the car in either direction. the cam 13 is dis engaged from the shoe 25, which movement permits of a retraction of the latch-lever and its connected latch member by the spring 22, for the automatic closing ofthe door. Also to provide, in the event of an adjacent fire, for the closina of the door when openly locked by the elevator-car, a bolt 33, having a head 31. slidingly mounted in guide lugs tixed upon 'the angle-firame 14, which flatter is also provided with an eyeconnectio liifi for receiving one end of a tensionspring, 37; the opposite end'of which secured to an eye fixed in the projecting terminal 39 of the bolt 33. To the ter minal 89 is also fixed an eye 40 for receiving one end ofa wire 41, which is led upwardly to an adjacent point within the building where itsvoppositeend is connected to an ordinary fixed fusible-link 42,. whiclnnormall; actsin oppositi'onto the sprin retain the bolt 33 in its upper or cl at pr n theie'vent of an adiacent fire the fusible the release of carrier-bar I (JlOHIUg of the door. encircle the stem 28 and bear at its lower end 5 j l'lfleli'lbe tion witl'trespect to the latch-m mber i8 1 link 12- is parted and the resistance of the viii-e41 overcome, permitting the tension of spring ll to effect a downward movement of bolt 33 3-. The head ll of this bolt is provided with a beveled working face 43, which engages the projecting end of the latch-pin 21 and urges the latch member inward against the action of the spring 20 to efiect and permit the iuirinlv the use of relatively ide doors,

f ltlltllt;-, operating upon both ends of the carwhich is retained thus con'ipressed by the en riot-bar may be employed.

ith the use oi the above-described latch n, will be clear that upon the opening oi the i t h-vator-door the same will remain open only when the car is suitably alined therewith under normal conditions of temperature, and will autmnatically ch re under all other conditions it manually released.

What I claim as my invention and desire to secure by Letters Patent, is:

1. The combination with a manuallyopened self-closing elevat0rdoor having a carrier-bar secured thereto, of a latch supported adjacent said door and normally held out of engagement with said carrierbar, a recoiler supported adjacent said latch und adapted to be engaged by said carrierbar, an elevator-car, a cam fixed to the car for projecting said latch for engagement with the carrier-bar;whereby the door may be held in open position in opposition to the recoiler when the car is alined with respect thereto, and latch-releasing means including a fusiblelink connection adapted to operate when the door is latched in open position;

2. The combination with a self-closing vertically slidable elevat0r-d0or, of a spring retracted latch-lever pivotally supported adjacent said door, a yielding latch-member pivotally carried by said latch-lever and adapted to engage and hold the door in open position, a shoe adjustably secured to said latch-lever, an elevator-car, and a cam fixed to the car and adapted to engage said shoe and project the latch-lever for the engagement of the latch-member to hold the door in open position while the car'is at rest at thatffioor'o'f the building and to release said latchand allow the door to close when the ear leaves thefloorin either direction. 3;"The' combination with a manuallyopen'ed self-closing elevator-door, of a latchframe fixed'adjac'ent thereto, a latch-lever yieldinqly mounted upon said frame, a latch jieldingly mounted upon said latchlever and normally-"held out of engagementwith said door an elevator-war, a cam sccured to the ear and ada'pted to project said engagement with said latch member in up 1 latch member for engagement with said position to said spring.

door, a bolt slidably mounted upon said Sip'ned at New York, in the county of frame and adapted to retract said latch New York and State of New York this member independently of said latch-lever, tenth day of January, A. D. 1911.

a spring normally disposed to actuate said v J MIN W L K bolt, a fusible-link secured adjacent said Witnesses:

door, and a connection between said link Rose Fnunnmcn'r,

and bolt whereby the latter is held out of. ().L1-:AN KIESELBACH. 

